Shock-absorber.



B. REID. SHOCK ABSORBER. APPLICATION FILED MAB- 27,1913.

1,071,463, Patented Aug. 26, 1913.

v J a i; W a JJ 14 1 15,; 1? p Inventor by Z i 2 Z Attorneys UNITED STATES PATENT OFFICE.

GEORGE IB IREID, OF ABERDEEN, WASHINGTON snocK-ABsoaBEii.

Application filed March 27, 1913. Serialflo. 757,230.

Specification of Letters .Eatent.

absorbing device adapted to be positioned upon a vehicle for the purpose of absorbing and eliminating those abnormal stresses which tend to injure the springs and to produce unpleasant and injurious vibrations of the vehicle frame. 7 r This invention has for an object to pro; vide a device which will offer a resistance to the rebound of the vehicle body, increasing:

in proportion as the increased.

A further object is shock absorbing device which will be simple force of therebound is in construction, cheap to manufacture and;'

' ;.ad ustmg member 10, from \VlHChwltfiWll elli'eieut in its operation.

-\Vith the foregoing and other objects in view which will appear as the description to provide an efficient proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invent-ion herein disclosed, can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the drawings accompanying this speciiieation and forming a part thereof, the preferable form of my invention is illus tratcd, in which Figure 1 is a front view of a portion of a vehicle showing my improved shock absorber secured thereto. Fig. 2 is a similar view with the vehicle spring compressed. -ig. 3 is a plan view of thedrum supporting reohanisin of my improved shock absorber.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, 1 represents the cylindrical portion of a vehicle. axle which is secured to the frame 2 by means of the usual elliptical or semi-elliptical spring 3 and my improved shock absorbing device is adapted to prevent any sudden relative movement of the axle 1 and the frame 2 and to further, eliminate or absorb a rebound ofthe spring such as would take which suitahleapertures have beenjcupa' adapted tov belocked thereto A -torsion Patented Aug. 26,1913.

place when the axle 1 is suddenl toward the frame2 as illustrated in Fig and then rebounds to the positionkas il-lu trated inYFig. 1. Rigidly secured to the frame 2 1 I p p 6;) 4 provided with apertures 5 therein :where; by the said plate may be suitably, sec t the frame 2. The plate-. is cut and the upstanding beari-ng member tatably mount a drum 8 'Whichfitsw thi p5 the said cuteawayrportion 6., The bearing lg i members 7 are upstanding plates.through-m.

extending through the said apertures shaft 9 to one end of whichisrigidly-i-se; cured the drum 8. Secured ,to the bearing .member 7 which is adjacent the din-111,8 is,.;.

a spring adjusting member 10 wliichthreadrf'ir edly. engages the said. member ,7 iand is spring llxisrigidly securedtenths-shaft as at 12 and the front end. of said. torsional. spring 11- is rigidly secured,; to the spring apparent that'thespring .11 @adapt'. resiliently control the: movements so'f lw' drum 8 and that fin'therm-ore: th'eitbrsitinaliii stress exerted upon the drum :.'byi .=rea'so 1 nor of the spring 11 maybe; adjustedthyireasoniai of the member 10. "Secured to: the-' i cleu axle 1 is the sleeve l3 which supports au-c .ley lel thcreon and it is to be notedsthat'gt hc "7 pulley 14 may be locked rigidgwithire'p ect to its supporting shaft- 15, the purpose lolaiha,gi hereinafter more fully set forth. A friction 510' belt or strap 16 is secured to tl-iedrum 8iaiid is adapted to wind about the same as illu'strated in Fig. 2 of'the drawings. The re mote end of the said belt or strap 16 is rigidly secured to the plate 4 as at 17. The said belt or strap 16 passes down from the securing plate 4 around the pulley 14 and then upward and to the drum 8 to which it is secured.

One of the particular, advantages at- 100, taehed to my improved device lies in the fact that the friction between two contact ing surfaces is a function of and directly proportionate to the pressure between the said surfaces, from which it will e'apparent that should the axle 1 be foiced toward the vehicle frame 2 as would happen when the Wheels hit an irregularity in the road or other surface, the tendency ofthe frame 2t0 rebound will be .pro ortionately increased 21.10

' and therefore the pressure exerted upon the belt by reason of the pulley 14 will also be increased and therefore the friction between the said pulley and the belt will be magnified and the shock thereby successfully absorbed. The normally tendency of the drum to rotate insures that the'belt 16 will be held.

in frictional engagement with the pulley 14.

From the foregoing it wi l be apparent that in improved shock absorbing device will 0 er a resistance to the movement of the parts'to which it is attached directly proportional to the force or stress tending to cause the said movement. Furthermore, it will be apparent that my improved shock absorbing device may be attached to any relatively movable parts which are subject to shocks or other abnormal stresses. Should the occasion so arise when it is not desirous or advantageous to utilize the friction between the belt and the pulley 14, the

said pulley may be unkeyed or rotatably secured to its supporting shaft 15 and the torsional stress of the spring 11 will then be suitably increased so that the spring 11 may successfully take up and absorb any shocks its supporting shaft 15 and by reason of the torsional. strength of the spring Ill.

Having thus fully described the construction and operation of my improved. device, What I claim to be new and original with me is 1. The combination with a vehicle frame and axle, a cylindrical member secured to said axle, of a shock absorbing device'coirk prising a drum, a rotatable shaft secured thereto, a torsional spring secured to said shaft and to said frame adapted to rotate said shaft, a friction belt secured to said frame extending around saidcylindrical member on the axle and the other end of said belt secured to said drum adapted to wind about the same, said drum adapted to hold said belt in frictional engagement with said cylindrical member on said axle.

2. In a shock absorbing device the coinhinatio-n of a vehicle axle, a frame supported thereabove, a pulley secured to said axle,

a drum secured to a shaft, said shaft mounted upon said frame, a torsional spring se cured to said frame and to said shaft and adapted to rotate said drui'n, a friction belt secured to said drum adapted to wind upon the same and passing around the pui ley on the axle and the remote end of said belt secured to said frame.

In testimony that I claim the foregoing as my'own. I have hereto affixed my signature in the presence of two witnesses.

GEORGE 13. HEN).

lVitnesses:

M. J. IIARTLEY, C. W. Banana. 

